- r = sd_bus_request_name(a, name, param);
- if (r < 0) {
- if (r == -EALREADY)
- return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
-
- set_remove(owned_names, (char*) name);
-
- if (r == -EEXIST)
- return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
- return synthetic_reply_method_errno(m, r, NULL);
- }
-
- in_queue = (r == 0);
-
- if (in_queue)
- return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
-
- return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
-
- } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) {
- _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
- const char *name;
- uint32_t flags;
-
- if (!sd_bus_message_has_signature(m, "su"))
- return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
- r = sd_bus_message_read(m, "su", &name, &flags);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- if (flags != 0)
- return synthetic_reply_method_errno(m, -EINVAL, NULL);
-
- r = sd_bus_get_name_creds(a, name, 0, NULL);
- if (r >= 0 || streq(name, "org.freedesktop.DBus"))
- return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
- if (r != -ESRCH)
- return synthetic_reply_method_errno(m, r, NULL);
-
- r = sd_bus_message_new_method_call(
- a,
- &msg,
- name,
- "/",
- "org.freedesktop.DBus.Peer",
- "Ping");
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- r = sd_bus_send(a, msg, NULL);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
-
- } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) {
- _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
- _cleanup_strv_free_ char **args = NULL;
-
- if (!sd_bus_message_has_signature(m, "a{ss}"))
- return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
- r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}");
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) {
- _cleanup_free_ char *s = NULL;
- const char *key;
- const char *value;
-
- r = sd_bus_message_read(m, "ss", &key, &value);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- s = strjoin(key, "=", value, NULL);
- if (!s)
- return synthetic_reply_method_errno(m, -ENOMEM, NULL);
-
- r = strv_extend(&args, s);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- r = sd_bus_message_exit_container(m);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
- }
-
- r = sd_bus_message_exit_container(m);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- if (!args)
- return synthetic_reply_method_errno(m, -EINVAL, NULL);
-
- r = sd_bus_message_new_method_call(
- a,
- &msg,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "SetEnvironment");
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- r = sd_bus_message_append_strv(msg, args);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- r = sd_bus_call(a, msg, 0, NULL, NULL);
- if (r < 0)
- return synthetic_reply_method_errno(m, r, NULL);
-
- return synthetic_reply_method_return(m, NULL);
-
- } else {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member);
-
- return synthetic_reply_method_errno(m, r, &error);
- }
-}
-
-static int handle_policy_error(sd_bus_message *m, int r) {
- if (r == -ESRCH || r == -ENXIO)
- return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", m->destination);
-
- return r;
-}
-
-static int process_policy(sd_bus *from, sd_bus *to, sd_bus_message *m, Policy *policy, const struct ucred *our_ucred, Set *owned_names) {
- int r;
-
- assert(from);
- assert(to);
- assert(m);
-
- if (!policy)
- return 0;
-
- if (from->is_kernel) {
- uid_t sender_uid = UID_INVALID;
- gid_t sender_gid = GID_INVALID;
- char **sender_names = NULL;
- bool granted = false;
-
- /* Driver messages are always OK */
- if (streq_ptr(m->sender, "org.freedesktop.DBus"))
- return 0;
-
- /* The message came from the kernel, and is sent to our legacy client. */
- r = sd_bus_creds_get_well_known_names(&m->creds, &sender_names);
- if (r < 0)
- return r;
-
- (void) sd_bus_creds_get_uid(&m->creds, &sender_uid);
- (void) sd_bus_creds_get_gid(&m->creds, &sender_gid);
-
- /* First check whether the sender can send the message to our name */
- if (set_isempty(owned_names)) {
- if (policy_check_send(policy, sender_uid, sender_gid, m->header->type, NULL, m->path, m->interface, m->member))
- granted = true;
- } else {
- Iterator i;
- char *n;
-
- SET_FOREACH(n, owned_names, i)
- if (policy_check_send(policy, sender_uid, sender_gid, m->header->type, n, m->path, m->interface, m->member)) {
- granted = true;
- break;
- }
- }
-
- if (granted) {
- /* Then check whether us (the recipient) can recieve from the sender's name */
- if (strv_isempty(sender_names)) {
- if (policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
- return 0;
- } else {
- char **n;
-
- STRV_FOREACH(n, sender_names) {
- if (policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, *n, m->path, m->interface, m->member))
- return 0;
- }
- }
- }
-
- /* Return an error back to the caller */
- if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
- return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML receiver policy.");
-
- /* Return 1, indicating that the message shall not be processed any further */
- return 1;
- }
-
- if (to->is_kernel) {
- _cleanup_bus_creds_unref_ sd_bus_creds *destination_creds = NULL;
- uid_t destination_uid = UID_INVALID;
- gid_t destination_gid = GID_INVALID;
- const char *destination_unique = NULL;
- char **destination_names = NULL;
- bool granted = false;
-
- /* Driver messages are always OK */
- if (streq_ptr(m->destination, "org.freedesktop.DBus"))
- return 0;
-
- /* The message came from the legacy client, and is sent to kdbus. */
- if (m->destination) {
- r = bus_get_name_creds_kdbus(to, m->destination,
- SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME|
- SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID,
- true, &destination_creds);
- if (r < 0)
- return handle_policy_error(m, r);
-
- r = sd_bus_creds_get_well_known_names(destination_creds, &destination_names);
- if (r < 0)
- return handle_policy_error(m, r);
-
- r = sd_bus_creds_get_unique_name(destination_creds, &destination_unique);
- if (r < 0)
- return handle_policy_error(m, r);
-
- (void) sd_bus_creds_get_uid(destination_creds, &destination_uid);
- (void) sd_bus_creds_get_gid(destination_creds, &destination_gid);
- }
-
- /* First check if we (the sender) can send to this name */
- if (strv_isempty(destination_names)) {
- if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
- granted = true;
- } else {
- char **n;
-
- STRV_FOREACH(n, destination_names) {
- if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, *n, m->path, m->interface, m->member)) {
-
- /* If we made a receiver decision,
- then remember which name's policy
- we used, and to which unique ID it
- mapped when we made the
- decision. Then, let's pass this to
- the kernel when sending the
- message, so that it refuses the
- operation should the name and
- unique ID not map to each other
- anymore. */
-
- r = free_and_strdup(&m->destination_ptr, *n);
- if (r < 0)
- return r;
-
- r = bus_kernel_parse_unique_name(destination_unique, &m->verify_destination_id);
- if (r < 0)
- break;
-
- granted = true;
- break;
- }
- }
- }
-
- /* Then check if the recipient can receive from our name */
- if (granted) {
- if (set_isempty(owned_names)) {
- if (policy_check_recv(policy, destination_uid, destination_gid, m->header->type, NULL, m->path, m->interface, m->member))
- return 0;
- } else {
- Iterator i;
- char *n;
-
- SET_FOREACH(n, owned_names, i)
- if (policy_check_recv(policy, destination_uid, destination_gid, m->header->type, n, m->path, m->interface, m->member))
- return 0;
- }
- }
-
- /* Return an error back to the caller */
- if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
- return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML sender policy.");
-
- /* Return 1, indicating that the message shall not be processed any further */
- return 1;
- }
-
- return 0;
-}
-
-static int process_hello(sd_bus *a, sd_bus *b, sd_bus_message *m, bool *got_hello) {
- _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
- bool is_hello;
- int r;
-
- assert(a);
- assert(b);
- assert(m);
- assert(got_hello);
-
- /* As reaction to hello we need to respond with two messages:
- * the callback reply and the NameAcquired for the unique
- * name, since hello is otherwise obsolete on kdbus. */
-
- is_hello =
- sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "Hello") &&
- streq_ptr(m->destination, "org.freedesktop.DBus");
-
- if (!is_hello) {
-
- if (*got_hello)
- return 0;
-
- log_error("First packet isn't hello (it's %s.%s), aborting.", m->interface, m->member);
- return -EIO;
- }
-
- if (*got_hello) {
- log_error("Got duplicate hello, aborting.");
- return -EIO;
- }
-
- *got_hello = true;
-
- if (!a->is_kernel)
- return 0;
-
- r = sd_bus_message_new_method_return(m, &n);
- if (r < 0)
- return log_error_errno(r, "Failed to generate HELLO reply: %m");
-
- r = sd_bus_message_append(n, "s", a->unique_name);
- if (r < 0)
- return log_error_errno(r, "Failed to append unique name to HELLO reply: %m");
-
- r = bus_message_append_sender(n, "org.freedesktop.DBus");
- if (r < 0)
- return log_error_errno(r, "Failed to append sender to HELLO reply: %m");
-
- r = bus_seal_synthetic_message(b, n);
- if (r < 0)
- return log_error_errno(r, "Failed to seal HELLO reply: %m");
-
- r = sd_bus_send(b, n, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to send HELLO reply: %m");
-
- n = sd_bus_message_unref(n);
- r = sd_bus_message_new_signal(
- b,
- &n,
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "NameAcquired");
- if (r < 0)
- return log_error_errno(r, "Failed to allocate initial NameAcquired message: %m");
-
- r = sd_bus_message_append(n, "s", a->unique_name);
- if (r < 0)
- return log_error_errno(r, "Failed to append unique name to NameAcquired message: %m");
-
- r = bus_message_append_sender(n, "org.freedesktop.DBus");
- if (r < 0)
- return log_error_errno(r, "Failed to append sender to NameAcquired message: %m");
-
- r = bus_seal_synthetic_message(b, n);
- if (r < 0)
- return log_error_errno(r, "Failed to seal NameAcquired message: %m");
-
- r = sd_bus_send(b, n, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to send NameAcquired message: %m");
-
- return 1;
-}
-
-static int patch_sender(sd_bus *a, sd_bus_message *m) {
- char **well_known = NULL;
- sd_bus_creds *c;
- int r;
-
- assert(a);
- assert(m);
-
- if (!a->is_kernel)
- return 0;
-
- /* We will change the sender of messages from the bus driver
- * so that they originate from the bus driver. This is a
- * speciality originating from dbus1, where the bus driver did
- * not have a unique id, but only the well-known name. */
-
- c = sd_bus_message_get_creds(m);
- if (!c)
- return 0;
-
- r = sd_bus_creds_get_well_known_names(c, &well_known);
- if (r < 0)
- return r;
-
- if (strv_contains(well_known, "org.freedesktop.DBus"))
- m->sender = "org.freedesktop.DBus";
-
- return 0;
-}
-
-static int mac_smack_apply_label_and_drop_cap_mac_admin(pid_t its_pid, const char *new_label) {
-#ifdef HAVE_SMACK
- int r = 0, k;
-
- if (!mac_smack_use())
- return 0;
-
- if (new_label && its_pid > 0)
- r = mac_smack_apply_pid(its_pid, new_label);
-
- k = drop_capability(CAP_MAC_ADMIN);
- return r < 0 ? r : k;
-#else
- return 0;
-#endif
-}
-
-int main(int argc, char *argv[]) {
-
- _cleanup_bus_close_unref_ sd_bus *a = NULL, *b = NULL;
- sd_id128_t server_id;
- int r, in_fd, out_fd;
- bool got_hello = false;
- bool is_unix;
- struct ucred ucred = {};
- _cleanup_free_ char *peersec = NULL;
- Policy policy_buffer = {}, *policy = NULL;
- _cleanup_set_free_free_ Set *owned_names = NULL;
-
- log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
- log_parse_environment();
- log_open();
-
- r = parse_argv(argc, argv);
- if (r <= 0)
- goto finish;
-
- r = sd_listen_fds(0);
- if (r == 0) {
- in_fd = STDIN_FILENO;
- out_fd = STDOUT_FILENO;
- } else if (r == 1) {
- in_fd = SD_LISTEN_FDS_START;
- out_fd = SD_LISTEN_FDS_START;
- } else {
- log_error("Illegal number of file descriptors passed");
- goto finish;
- }
-
- is_unix =
- sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 &&
- sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0;
-
- if (is_unix) {
- (void) getpeercred(in_fd, &ucred);
- (void) getpeersec(in_fd, &peersec);
-
- r = mac_smack_apply_label_and_drop_cap_mac_admin(getpid(), peersec);
- if (r < 0)
- log_warning_errno(r, "Failed to set SMACK label (%s) and drop CAP_MAC_ADMIN: %m", peersec);
- }
-
- if (arg_drop_privileges) {
- const char *user = "systemd-bus-proxy";
- uid_t uid;
- gid_t gid;
-
- r = get_user_creds(&user, &uid, &gid, NULL, NULL);
- if (r < 0) {
- log_error_errno(r, "Cannot resolve user name %s: %m", user);
- goto finish;
- }
-
- r = drop_privileges(uid, gid, 1ULL << CAP_IPC_OWNER);
- if (r < 0)
- goto finish;
- }
-
- owned_names = set_new(&string_hash_ops);
- if (!owned_names) {
- log_oom();
- goto finish;
- }
-
- r = sd_bus_new(&a);
- if (r < 0) {
- log_error_errno(r, "Failed to allocate bus: %m");
- goto finish;
- }
-
- r = sd_bus_set_description(a, "sd-proxy");
- if (r < 0) {
- log_error_errno(r, "Failed to set bus name: %m");
- goto finish;
- }
-
- r = sd_bus_set_address(a, arg_address);
- if (r < 0) {
- log_error_errno(r, "Failed to set address to connect to: %m");
- goto finish;
- }
-
- r = sd_bus_negotiate_fds(a, is_unix);
- if (r < 0) {
- log_error_errno(r, "Failed to set FD negotiation: %m");
- goto finish;
- }
-
- r = sd_bus_negotiate_creds(a, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_GID|SD_BUS_CREDS_SELINUX_CONTEXT);
- if (r < 0) {
- log_error_errno(r, "Failed to set credential negotiation: %m");
- goto finish;
- }
-
- if (ucred.pid > 0) {
- a->fake_pids.pid = ucred.pid;
- a->fake_pids_valid = true;
-
- a->fake_creds.uid = ucred.uid;
- a->fake_creds.euid = UID_INVALID;
- a->fake_creds.suid = UID_INVALID;
- a->fake_creds.fsuid = UID_INVALID;
- a->fake_creds.gid = ucred.gid;
- a->fake_creds.egid = GID_INVALID;
- a->fake_creds.sgid = GID_INVALID;
- a->fake_creds.fsgid = GID_INVALID;
- a->fake_creds_valid = true;
- }
-
- if (peersec) {
- a->fake_label = peersec;
- peersec = NULL;
- }
-
- a->manual_peer_interface = true;
-
- r = sd_bus_start(a);
- if (r < 0) {
- log_error_errno(r, "Failed to start bus client: %m");
- goto finish;
- }
-
- r = sd_bus_get_bus_id(a, &server_id);
- if (r < 0) {
- log_error_errno(r, "Failed to get server ID: %m");
- goto finish;
- }
-
- if (a->is_kernel) {
- if (!arg_configuration) {
- const char *scope;
-
- r = sd_bus_get_scope(a, &scope);
- if (r < 0) {
- log_error_errno(r, "Couldn't determine bus scope: %m");
- goto finish;
- }
-
- if (streq(scope, "system"))
- arg_configuration = strv_new(
- "/etc/dbus-1/system.conf",
- "/etc/dbus-1/system.d/",
- "/etc/dbus-1/system-local.conf",
- NULL);
- else if (streq(scope, "user"))
- arg_configuration = strv_new(
- "/etc/dbus-1/session.conf",
- "/etc/dbus-1/session.d/",
- "/etc/dbus-1/session-local.conf",
- NULL);
- else {
- log_error("Unknown scope %s, don't know which policy to load. Refusing.", scope);
- goto finish;
- }
-
- if (!arg_configuration) {
- r = log_oom();
- goto finish;
- }
- }
-
- r = policy_load(&policy_buffer, arg_configuration);
- if (r < 0) {
- log_error_errno(r, "Failed to load policy: %m");
- goto finish;
- }
-
- policy = &policy_buffer;
- /* policy_dump(policy); */
-
- if (!policy_check_hello(policy, ucred.uid, ucred.gid)) {
- r = log_error_errno(EPERM, "Policy denied connection.");
- goto finish;
- }
- }
-
- r = sd_bus_new(&b);
- if (r < 0) {
- log_error_errno(r, "Failed to allocate bus: %m");
- goto finish;
- }
-
- r = sd_bus_set_fd(b, in_fd, out_fd);
- if (r < 0) {
- log_error_errno(r, "Failed to set fds: %m");
- goto finish;
- }
-
- r = sd_bus_set_server(b, 1, server_id);
- if (r < 0) {
- log_error_errno(r, "Failed to set server mode: %m");
- goto finish;
- }
-
- r = sd_bus_negotiate_fds(b, is_unix);
- if (r < 0) {
- log_error_errno(r, "Failed to set FD negotiation: %m");
- goto finish;
- }
-
- r = sd_bus_negotiate_creds(b, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_GID|SD_BUS_CREDS_SELINUX_CONTEXT);
- if (r < 0) {
- log_error_errno(r, "Failed to set credential negotiation: %m");
- goto finish;
- }
-
- r = sd_bus_set_anonymous(b, true);
- if (r < 0) {
- log_error_errno(r, "Failed to set anonymous authentication: %m");
- goto finish;
- }
-
- b->manual_peer_interface = true;
-
- r = sd_bus_start(b);
- if (r < 0) {
- log_error_errno(r, "Failed to start bus client: %m");
- goto finish;
- }
-
- r = rename_service(a, b);
- if (r < 0)
- log_debug_errno(r, "Failed to rename process: %m");
-
- if (a->is_kernel) {
- _cleanup_free_ char *match = NULL;
- const char *unique;
-
- r = sd_bus_get_unique_name(a, &unique);
- if (r < 0) {
- log_error_errno(r, "Failed to get unique name: %m");
- goto finish;
- }
-
- match = strjoin("type='signal',"
- "sender='org.freedesktop.DBus',"
- "path='/org/freedesktop/DBus',"
- "interface='org.freedesktop.DBus',"
- "member='NameOwnerChanged',"
- "arg1='",
- unique,
- "'",
- NULL);
- if (!match) {
- log_oom();
- goto finish;
- }
-
- r = sd_bus_add_match(a, NULL, match, NULL, NULL);
- if (r < 0) {
- log_error_errno(r, "Failed to add match for NameLost: %m");
- goto finish;
- }
-
- free(match);
- match = strjoin("type='signal',"
- "sender='org.freedesktop.DBus',"
- "path='/org/freedesktop/DBus',"
- "interface='org.freedesktop.DBus',"
- "member='NameOwnerChanged',"
- "arg2='",
- unique,
- "'",
- NULL);
- if (!match) {
- log_oom();
- goto finish;
- }
-
- r = sd_bus_add_match(a, NULL, match, NULL, NULL);
- if (r < 0) {
- log_error_errno(r, "Failed to add match for NameAcquired: %m");
- goto finish;
- }
- }
-
- for (;;) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int events_a, events_b, fd;
- uint64_t timeout_a, timeout_b, t;
- struct timespec _ts, *ts;
- struct pollfd *pollfd;
- int k;
-
- if (got_hello) {
- /* Read messages from bus, to pass them on to our client */
-
- r = sd_bus_process(a, &m);
- if (r < 0) {
- /* treat 'connection reset by peer' as clean exit condition */
- if (r == -ECONNRESET)
- r = 0;
- else
- log_error_errno(r, "Failed to process bus a: %m");
-
- goto finish;
- }
-
- if (m) {
- bool processed = false;
-
- /* We officially got EOF, let's quit */
- if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
- r = 0;
- goto finish;
- }
-
- k = synthesize_name_acquired(a, b, m);
- if (k < 0) {
- r = k;
- log_error_errno(r, "Failed to synthesize message: %m");
- goto finish;
- }
-
- patch_sender(a, m);
-
- if (policy) {
- k = process_policy(a, b, m, policy, &ucred, owned_names);
- if (k < 0) {
- r = k;
- log_error_errno(r, "Failed to process policy: %m");
- goto finish;
- } else if (k > 0) {
- r = 1;
- processed = true;
- }
- }
-
- if (!processed) {
- k = sd_bus_send(b, m, NULL);
- if (k < 0) {
- if (k == -ECONNRESET)
- r = 0;
- else {
- r = k;
- log_error_errno(r, "Failed to send message to client: %m");
- }
-
- goto finish;
- } else
- r = 1;
- }
- }
-
- if (r > 0)
- continue;
- }
-
- /* Read messages from our client, to pass them on to the bus */
- r = sd_bus_process(b, &m);
- if (r < 0) {
- /* treat 'connection reset by peer' as clean exit condition */
- if (r == -ECONNRESET)
- r = 0;
- else
- log_error_errno(r, "Failed to process bus b: %m");
-
- goto finish;
- }
-
- if (m) {
- bool processed = false;
-
- /* We officially got EOF, let's quit */
- if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
- r = 0;
- goto finish;
- }
-
- k = process_hello(a, b, m, &got_hello);
- if (k < 0) {
- r = k;
- log_error_errno(r, "Failed to process HELLO: %m");
- goto finish;
- } else if (k > 0) {
- processed = true;
- r = 1;
- }
-
- if (!processed) {
- k = process_driver(a, b, m, policy, &ucred, owned_names);
- if (k < 0) {
- r = k;
- log_error_errno(r, "Failed to process driver calls: %m");
- goto finish;
- } else if (k > 0) {
- processed = true;
- r = 1;
- }
-
- if (!processed) {
-
- for (;;) {
- if (policy) {
- k = process_policy(b, a, m, policy, &ucred, owned_names);
- if (k < 0) {
- r = k;
- log_error_errno(r, "Failed to process policy: %m");
- goto finish;
- } else if (k > 0) {
- processed = true;
- r = 1;
- break;
- }
- }
-
- k = sd_bus_send(a, m, NULL);
- if (k < 0) {
- if (k == -EREMCHG)
- /* The name database changed since the policy check, hence let's check again */
- continue;
- else if (k == -ECONNRESET)
- r = 0;
- else {
- r = k;
- log_error_errno(r, "Failed to send message to bus: %m");
- }
-
- goto finish;
- } else
- r = 1;
-
- break;
- }
- }
- }
- }
-
- if (r > 0)
- continue;
-
- fd = sd_bus_get_fd(a);
- if (fd < 0) {
- log_error_errno(r, "Failed to get fd: %m");
- goto finish;
- }
-
- events_a = sd_bus_get_events(a);
- if (events_a < 0) {
- log_error_errno(r, "Failed to get events mask: %m");
- goto finish;
- }
-
- r = sd_bus_get_timeout(a, &timeout_a);
- if (r < 0) {
- log_error_errno(r, "Failed to get timeout: %m");
- goto finish;
- }
-
- events_b = sd_bus_get_events(b);
- if (events_b < 0) {
- log_error_errno(r, "Failed to get events mask: %m");
- goto finish;
- }
-
- r = sd_bus_get_timeout(b, &timeout_b);
- if (r < 0) {
- log_error_errno(r, "Failed to get timeout: %m");
- goto finish;
- }
-
- t = timeout_a;
- if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a))
- t = timeout_b;
-
- if (t == (uint64_t) -1)
- ts = NULL;
- else {
- usec_t nw;
-
- nw = now(CLOCK_MONOTONIC);
- if (t > nw)
- t -= nw;
- else
- t = 0;
-
- ts = timespec_store(&_ts, t);
- }
-
- pollfd = (struct pollfd[3]) {
- {.fd = fd, .events = events_a, },
- {.fd = in_fd, .events = events_b & POLLIN, },
- {.fd = out_fd, .events = events_b & POLLOUT, }
- };
-
- r = ppoll(pollfd, 3, ts, NULL);
- if (r < 0) {
- log_error_errno(errno, "ppoll() failed: %m");
- goto finish;
- }
- }